Hello there, fathersonlawn. I'm here to help you fix the issue with your invoices and payments not downloading data in your QuickBooks Online mobile apps.
To begin with, let's refresh your data to ensure you have the latest information available in your QuickBooks Online app. Please ensure you're connected to the internet and perform the following steps for iOS:
Go to Settings, then click General.
Select iPhone Storage and tapthe QuickBooks Online app.
Click Offload App.
Once you've refreshed your data, restart your phone and check if you can see your invoices and payments data. If the issue persists, I recommend uninstalling and reinstalling the QuickBooks mobile app.
Alternatively, you can access your QBO account through your phone or computer-supported browser and then log in to your QuickBooks Online account via a browser.